Top 9 Smallest Window Air Conditioners Reviews

When you buy a window air conditioner, not only consider the brand but you also need to choose the size of a window air conditioner. If you have a small room around 150 square feet, you may need a small window air conditioner so not only wasting your money to buy a larger window air conditioner but also you will not be freezing when you are in an air-conditioned room.

Another reason why people choose to purchase a small window air conditioner because the room has a small window and a big size of air window conditioner will not fit on it. There are many small window air conditioners available in the market.

Below are the lists of top 9 smallest window air conditioners for your reference. The range of size is from 5,000 to 12,000 BTU since many customers are looking for a small unit of the window air conditioner but can provide 8,000 to 12,000 BTU.

Smallest Window Air Conditioners 5000 BTU Reviews

#1 Frigidaire FFRA0511U1

Frigidaire is a well-known home appliances brand which belongs to Electrolux, one of the best multinational manufacturers for home appliances from Europe. Frigidaire FFRA0511U1 has the size of 11.9 inches for height and 16.2 inches for width which makes this window air conditioner becomes one of the shortest designs among others.

This window air conditioner could fit on a small window with size 23-36 inches wide and with at least 12-inch opening. Frigidaire FFRA0511U1 has 5,000 BTU and it has two fan settings. It also has a fan-only mode which is suitable when you just want to have air circulation without cooling, and it produces less noise so it could help those who are a light sleeper.

Frigidaire FFRA0511U1 also has an auto-restart mode which means if there is an electricity outage, it will automatically turn the power on and restart to cooling the room. This model also doing a good job of eliminating humidity up to 1.6 pints per hour. The only disadvantage is this unit only has knob controls and hasn’t supported with a digital system. The price of Frigidaire FFRA0511U1 unit only is US$ 219.99 which is very affordable considering the great performance that this unit can offer.

#2 Frigidaire FFRA0511R1E

On our second recommendation of smallest window air conditioner, still from Frigidaire brand, we have Frigidaire FFRA0511R1E is a small window air conditioner with 5,000 BTU. Frigidaire FFRA0511R1E has rotatory mechanical controls and direction control of a 2-way air.

This is one of the most selling models from Frigidaire because the design is narrow and short with 12 inches for height and 16 inches for width, so it is very suitable to be put for small windows. If you have a window with the width around 23-36 inches and with at least 12-inch opening, this model will fit perfectly.

There are several features that Frigidaire FFRA0511R1E offers for customers, it has a mechanical control which could eliminate 1.1. pints moisture hourly. The digital version can eliminate less than this mechanical control can do. It has two cool speeds and two fan speeds, and it is one of the most valuable choices compared to other types and brands.

However, since Frigidaire FFRA0511R1E is a basic or standard model, it hasn’t supported with advanced features which usually are in the premium model such as Energy star, programmable timer or remote. Price for Frigidaire FFRA0511R1E unit only is US$ 240.66

#3 HomeLabs 5000

In number three, we have the HomeLabs 5,000. Not only considered as one of the smallest window air conditioners with the size of 12 inches for height and 16 inches for width, but this HomeLabs 5,000 is also one of the quietest among other window air conditioners. The unit could fit on a window with size 23 – 36 inches with a minimum 13 inches opening. It is suitable with the room that has 150 square feet size.

The HomeLabs 5,000 has the efficiency rating up to 11.1 EER which is close to the Energy star level. This model also provides cooling in super-fast time with 7 temperature setting which could make the room cool in 15 minutes. it has adjustable fan speeds and control system for two-way air direction.

Another plus feature from this unit is the reusable eco filter which the homeowner can clean it easily only with dish soap and warm water. It also could be cleaned with a dustbuster. Cleaning the filter regularly will maximize the performance of the air conditioner.

The unit also comes with support brackets, extendable side covers, window seal foam and a guide which could help the installer to have a drip-fee installation. The price of HomeLabs 5,000 is US$ 169.99, a very affordable window air conditioner which is perfect for a small room or apartment.

#4 Frigidaire FFRE0533U1

Another model from Frigidaire that is recommended as one of the smallest and also narrowest window air conditioners is Frigidaire FFRE0533U1 which has the size of 12.75 inches of height and 15.75 inches of width. This unit is suitable for a window with a size 22-36 inches and at least 12 inches of vertical opening.

If the other small unit from Frigidaire has two fan speeds, this Frigidaire FFRE0533U1 already has three fan speeds and it also has a notification alert when the filters need to be cleaned. This unit also can eliminate the humidity up to 1.5 pints hourly which is more significant than other Frigidaire models on the list.

Frigidaire FFRE0533U1 is 2016 energy star rated which has up to 12.2 EER energy efficiency which means you can save on the energy cost as well this unit is more ecofriendly. It has a one-year full warranty and 5 years warranty for the sealed system.

It can cool the room quickly and suitable for a room with 150 square feet in size. This unit also uses 115 electrical outlet which is standard in the United States. Frigidaire FFRE0533U1 is more expensive compared to other models but it gives more valued features. Price of this unit starts from US$ 299.9

#5 Kapsul Air W5

Even though this Kapsul Air W5 hasn’t been released yet in the market, it is worth to include in this list. Scheduled to be available in the market in 2019, this Kapsul Air W5 could be pre-ordered through the official website.

When it’s already launched, Kapsul Air W5 will be the smallest unit available for window air conditioner. Size of Kapsul Air W5 is 7 inches for height, 20 inches width and 22 inches length. Due to the shortest design size, this AC will need only at least 8 inches vertical opening and will not block any view from the window as other window air conditioner usually do.

In their official website, Kapsul Air W5 is very easy to install since it is supported with a patented adapter of the window frame which will require only one person to install this less than one house. this frame adapter also has other benefits such as remove the chance of the wrong installation and it is dripping free.

Kapsul Air W5 is compatible with advanced technology such as Alexa, Nest or Google Assistant. It is also supported with Wi-Fi system and it has an integrated system to control and monitor, humidity, temperature, kilowatt sensor and ambient light.

Smallest Window Air Conditioners 6000-12000 BTU Reviews

#1 Frigidaire FFRA0611R1

Frigidaire FFRA0611R1 has three sizes which are 6,000, 8,000 and 10,000 BTU. However, we are going to review the 6,000 BTU model. This window air conditioner can fit for a window with size 23-36 inches wide with at least 15 inches vertical opening due to its 13.5 x 18.5 inches size.

Since it has bigger BTU size, this model can cool a room with the size up to 250 square feet. It also can eliminate the humidity up to 1.3 pints hourly. The unit features two fan speeds and two cool speeds. It can save more electricity cost since it requires low power when the machine starts up.

Frigidaire FFRA0611R1 has the automatic restart system which when the power is back on, it could resume in its previous setting and operate automatically. The downside of this unit is that it doesn’t support any timer or remote. It also hasn’t supported with thermostat, so the air conditioner system only has low to high cooling settings.

However, with the compact design and its durability, this Frigidaire FFRA0611R1 has an affordable price which is around US$ 223.32. Frigidaire FFRA0611R1 is suitable for any budget-conscious consumer who is looking for a durable and reliable cooling unit.

#2 Koldfront WAC10002WCO

Frigidaire is still the winner for the smallest and compact window air conditioner but with the range of 5,000 to 8,000 BTU. However, if you are looking for bigger BTU, take a look at this Koldfront WAC10002WCO which is up to 10,000 BTU and is one of the smallest and narrowest sizes among others.

If Frigidaire small window air conditioner still using mechanical control, Koldfront WAC10002WCO already has a digital system and it is supported with 3 fan speeds. It is also doing a good job in eliminating the humidity.

Koldfront WAC10002WCO is also Energy Star rated which means it could reduce carbon productions and it helps the homeowner to save more energy costs. This model has sleep-mode which could help to save more energy as well Energy Saver system. It also gives the maximum comfort with not much noise produced by the unit.

The size of the Koldfront WAC10002WCO is 14.6 inches tall and 21.4 inches wide. It can fit a window with 23 – 26 inches wide and with at least 15.5 inches height. Even though this unit is considered heavy with 70lbs, but it is still not as heavy as other common air conditioners with 10,000 BTUs.

#3 Koldfront WAC12002WCO

Another model from Koldfront which is included in this list is Koldfront WAC12002WCO which has 14.6 inches tall and 19 inches wide. It can fit a window with 23-36 inches wide and at least 15.5 inches of the window height. One of the smallest and narrowest window air conditioners with cooling capacity up to 12.000 BTUs.

With the temperature setting from 62ᵒ to 86ᵒ F, this Koldfront WAC12002WCO ensure the homeowner to have a room always cool but also reduce energy cost. Koldfront WAC12002WCO is energy star rated with 24-hour timer, Energy Saver system and LED lighting for filter notification.

It also produces less noise compared to other brands and model with similar quality. This unit is also popular for being easy to install and give the best comfort for the homeowner.

It also has three fan speeds and automatic function such as dry and sleep mode. This model also has other features such as remote control, four-way air directional airflow, and suitable for a room up to 550 square feet size.

The price of Koldfront WAC12002WCO is around US$ 479.99 and a little bit higher compared to its sister model Koldfront WAC10002WCO. However, with its great performance and advanced features, it is still worth the price.

#4 Kenmore Smart 04277107

Kenmore is a well-known home appliances brand from Transform Holdco which have been in this industry for more than 100 years. Kenmore Smart 04277107 has the size of 15 inches tall and 23.6 inches wide, Kenmore Smart 04277107 is suitable for a window with a size of 27 – 39 inches wide with at least 16 inches height. This unit fits for a room with 300 to 500 square feet in size.

Even though Kenmore Smart 04277107 has a mechanical control, but this model already offers advanced features such as integrated with Wi-Fi and it is compatible with Alexa for voice control.

Kenmore Smart 04277107 offers a system which could be connected with a smartphone or a tablet using the Kenmore Smart AC application. It has an electronic remote and control panel. It has three fan speed and the filter could be removed and washed.

Even though it said it can be integrated with Alexa, many customers reviews mention that it still has several hiccups. Kenmore Smart 04277107 is Energy star rated and use 9% less energy compared to other average standard window air conditioner models. Price for Kenmore Smart 04277107 is higher than other average models due to the full feature which is around US$ 397.99.

Proper Window Sizing is Essential

The homeowners tend to choose the smallest window air conditioner without analyzing if it will be fit for the space of the room that needs to be cooled. Several problems can occur If the window air conditioner has a smaller size than it is supposed to be according to the room size.

The window air conditioner will not give the maximum cooling power which will make the room becomes warm. Since a window air conditioner also has another function to eliminate the humidity, when it doesn’t give enough dehumidification, it will result in the room to be muggy.

The air conditioner will also need to give extra work than it should be which can cause of more noise and it could shorten the durability of the machine which means that the homeowner will need to purchase a new unit which can cause more money that it is supposed to be.

Below is the table for a list of room size with the air conditioner with BTUs cooling capacity.

Room to be Cooled BTUs 
2,000 – 2,500 square feet 34,000
1,500 – 2,000 square feet 30,000
1,400 – 1,500 square feet 24,000
1,200 – 1,400 square feet 23,000
1,000 – 1,200 square feet 21,000
700 – 1,000 square feet 18,000
550 – 700 square feet 14,000
450 – 550 square feet 12,000
400 – 450 square feet 10,000
350 – 400 square feet 9,000
300 – 350 square feet 8,000
250 – 300 square feet 7,000
150 – 250 square feet 6,000
100 – 150 square feet 5,000

This is the basic guide from the Energy star agency. However, other factors need to be considered when determining the size of the air conditioner such as the house layout, sun directions on how many people are occupying the room.

For example, if the house has many shades such as trees or other taller building, the capacity of the air conditioner could be reduced up to 10%. However, if the house has more sun exposure, the capacity of the air conditioner needs to be increased up to 10%.

The capacity of the air conditioner needs to be added around 600 BTUs per additional person who occupies in the room. And if the air conditioner is needed to cool a kitchen, it will need another 400 BTUs from standard capacity.

Please note that there are BTUs models that rarely made such as 7,00 BTUs, for this case you can choose between a 6,000 – 8,000 BTUs. Therefore, you can ask for a professional AC technician if you are not sure about which capacity that is needed for a room that you want to install an air conditioner.

Choosing the Best Small Window Air Conditioner

After having discussed the right size of a window air conditioner that you need, there are other buying tips that you can use before deciding to purchase a window air conditioner. If you use the air conditioner frequently and it is very rare for you to turn it off, then it is recommended for you to choose an Energy Star rated window air conditioners such as Frigidaire FFRA0611R1 or HomeLabs 5,000.

Even though the Energy Star rated window air conditioner has a higher price than the average models without Energy star rated but if you use the air conditioner often then it will cut more energy cost and environmentally friendly. It will be a worthy investment.

The energy star rated air conditioner is available from 5,000, 8,000, 10,000 to 12,000 BTUs. To choose the right size of this cooling capacity, refer to the previous discussion about room size and capacity needed.

Next point that you will need to consider buying a window air conditioner is the features that the model offers. For example, if you are ok to turn on the AC when you are back and turn it off when you leave the room, then choose a window air conditioner with mechanical control which is cheaper than the air conditioner with smart technology.

However, if you prefer to have a digital system where you can turn on the air conditioner when you are nearby at home so you can have the room the be cooled when you enter the room, you can invest in a digital window air conditioner.